Bootstrap轮播控制选项

Question

大家都在使用bootstrap carousel我的问题是我需要在点击第一张幻灯片之后添加show previous control，如果幻灯片结束则必须禁用下一个控件。

我怎么得到这个。

我的caurosel看起来像

<div id="carousel-example-generic" class="carousel slide" data-ride="carousel">
  <!-- Indicators -->
  <ol class="carousel-indicators">
    <li data-target="#carousel-example-generic" data-slide-to="0" class="active"></li>
    <li data-target="#carousel-example-generic" data-slide-to="1"></li>
    <li data-target="#carousel-example-generic" data-slide-to="2"></li>
  </ol>

  <!-- Wrapper for slides -->
  <div class="carousel-inner">
    <div class="item active">
      <img src="..." alt="...">
      <div class="carousel-caption">
        ...
      </div>
    </div>
    ...
  </div>

  <!-- Controls -->
  <a class="left carousel-control" href="#carousel-example-generic" data-slide="prev">
    <span class="glyphicon glyphicon-chevron-left"></span>
  </a>
  <a class="right carousel-control" href="#carousel-example-generic" data-slide="next">
    <span class="glyphicon glyphicon-chevron-right"></span>
  </a>
</div>

Answer 1

您可以通过像这样确定当前幻灯片来有条件地显示控件..

$('#myCarousel').on('slid.bs.carousel', function (ev) {
  var carouselData = $(this).data('bs.carousel');
  var currentIndex = carouselData.getActiveIndex();

  if (currentIndex >= 1) {
    $('.left').show();
  }
  else {
    $('.left').hide();
  }

  if (currentIndex === (carouselData.$items.length-1)) {
    $('.right').hide();
    $('.left').show();
  }
  else {
    $('.right').show();
  }
})

演示：http://www.bootply.com/R11GWNqkSh